PPG Industries, the $15.8 billion Pittsburgh-based supplier of paint, chemicals and glass, hired Robert Dellinger as senior vice president of finance and said he will become CFO on Oct. 15. The company announced in May that William Hernandez, its CFO since 1995, would step down in October. Dellinger, 49, most recently was CFO for Delphi Corp. Earlier, he was CFO at Sprint and spent 19 years in finance positions at General Electric, including serving as CFO of GE Superabrasives, GE Plastics Pacific, GE Motors and Industrial Systems and GE Employers Reinsurance Corp.

Aetna, the $30.9 billion health insurance company, has named Kim Keck to lead investor relations. She succeeds Jeffrey Chaffkin, who is leaving the Hartford, Conn.-based company to pursue personal interests. Keck, 45, most recently served as Aetna's head of finance, corporate, a position in which she led treasury and the controller, actuarial and tax groups. Since joining Aetna in 1988, Keck has also served as head of planning and performance management and head of capital management and rating agencies.

Delek US Holdings, a $4.6 billion oil refiner based in Brentwood, Tenn., has appointed Mark Cox CFO and executive vice president. He succeeds Edward Morgan, who left the company in April to become CFO of CVR Energy. Mr. Cox, 50, most recently was treasurer, director of investor relations and senior vice president at Western Refining. He joined Western in 2007 when it acquired Giant Industries, another refining company, where he had worked since 1994. Cox's final position at Giant was CFO and executive vice president.